3 research outputs found
Phase Transitions of Charged Kerr-AdS Black Holes from Large-N Gauge Theories
We study N =4 super Yang-Mills theories on a three sphere with two kinds of
chemical potentials. One is associated with the R-symmetry and the other with
the rotational symmetry of S^3 (SO(4) symmetry). These correspond to the
charged Kerr-AdS black holes via AdS/CFT. The exact partition functions at zero
coupling are computed and the thermodynamical properties are studied. We find a
nontrivial gap between the confinement/deconfinement transition line and the
boundary of the phase diagram when we include more than four chemical
potentials. In the dual gravity, we find such a gap in the phase diagram to
study the thermodynamics of the charged Kerr-AdS black hole. This shows that
the qualitative phase structures agree between the both sides. We also find
that the ratio of the thermodynamical quantities is almost well-known factor
3/4 even at the low temperature.Comment: 40 pages, 6 figures, v2: references added, v3: typos corrected and
references adde
The Efficacy of Radiotherapy without Surgery for External Auditory Canal Squamous Cell Carcinoma
External auditory canal (EAC) cancer is a rare disease for which there are no adequate evidence-based treatment strategies. Radiotherapy is often used as the initial treatment to preserve the organ. This study aimed to elucidate the efficacy of radiotherapy for EAC squamous cell carcinoma (SCC). Patients with T1 disease were treated with radiotherapy alone. Patients with T2โ4 disease were treated with chemoradiotherapy. The median follow-up period was 30.4 months. The 3-year local control (LC) rate for all patients was 51%, the disease-free survival (DFS) rate was 44%, and the overall survival (OS) rate was 73%. For T1โ3 disease, the 3-year LC rate was 74%, DFS was 62%, and OS was 89%. However, for T4 disease, the 3-year LC rate was 17%, DFS was 17%, and OS was 50%. In a univariate analysis, only the T-category was a significant factor for LC and DFS (p = 0.006 and 0.02, respectively). All local recurrences were within the high-dose irradiated area. The results of this study suggest chemoradiotherapy can be an alternative to a combination of surgery and postoperative radiation for T1โ3 SCC of the EAC. However, the efficacy of chemoradiotherapy in T4 cases was inadequate